Use of ruthenium and osmium catalysts for the metathesis of nitrile rubber
AssigneeArlanxeo Deutschland GmbH
InventorsSilvia Schnitzler, Sarah David
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Abstract
The present invention relates to the use of Ru and Os carbene complexes with a hydroxamic acid (ester) function for the metathesis degradation of nitrile rubber (NBR). The invention further relates to a method for producing hydrogenated nitrile rubbers, by subjecting a nitrile rubber to a metathesis degradation in the presence of the said catalyst, and the degraded nitrile rubber obtained subsequently undergoes a hydrogenation, preferably in situ.
Claims13
A method for the metathesis of nitrile rubber comprising carrying out a metathesis reaction of the nitrile rubber in the presence of a catalyst of formula (I) or (III):
A method for producing hydrogenated nitrile rubbers comprising subjecting a nitrile rubber to a metathesis degradation in the presence of a catalyst of the formula (I) or (III):
- thereby obtaining a degraded nitrile rubber, wherein the degraded nitrile rubber subsequently undergoes a hydrogenation.
Dependencies are inferred from the claim text.